I was hoping that someone could provide me with an example of how to use this On/Off switch (http://www.adafruit.com/products/482) to actually turn on or off an Arduino Fio please? My intent is that when the button is depressed the Fio is on and as such my code will take effect but if the switch is not depressed then the Fio receives no power. Currently I power my Fio using an FTDI connection with the USB cable connected to my laptop.

I'm relatively new at this so any assistance that you can provide would be immensely appreciated.

Cut the red (5v) wire on the FTDI cable. Splice a jumper from the cable-side cut end to the C1 pin on the switch. Splice another jumper from the connector-side cut end to the 'NO' pin on the switch. That will switch power on and off.

To light the led when the power is on, splice a jumper from the '-' pin to the black (ground) wire on the FTDI cable. Then solder another jumper between the 'NO' pin and the '+' pin.